Easiest method is to put your multimeter into mA mode, and put it in series with the Positive power lead into the board.Doing it in software, put a shunt in series with the power lead, use the arduino to do analog readings on both sides, and do the math: (Vhigh - Vlow)/shunt resistance, with Vhigh = analogreading * 5/1024 (or ~.00488)
Unless the system is using +/-12V or something, how would you get negative? Kinda lost me there.Measure both sides, take the difference, divide by the shunt value.
Please enter a valid email to subscribe
We need to confirm your email address.
To complete the subscription, please click the link in the
email we just sent you.
Thank you for subscribing!
via Egeo 16